// Copyright 2020 The Tilt Brush Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

using System.Collections.Generic;

namespace TiltBrush
{

    // Useful to ensure that objects are being compared by reference rather than by value.
    public class ReferenceComparer<T> : IEqualityComparer<T> where T : class
    {
        public bool Equals(T x, T y) { return ReferenceEquals(x, y); }
        public int GetHashCode(T obj) { return obj.GetHashCode(); }
    }

} // namespace TiltBrush
